I hope this is the right place to post!
I've had this avocado I grew from seed a couple years ago. About a week ago I noticed some of the leaves turning brown like in the pictures. I sprayed it with "Safer brand Garden Fungicide" which has worked well on my tomato plants. I let it dry, and then I put it back in it's window at night. Should I have sprayed it more? I'm terrified of burning it with chemicals. Or have I already done that? I feel like the poor thing is on it's last legs since all the leaves (except one older one) have this on them. It just put out 5 new leaves and 3 of them are already dead. It's lost about 6-7 leaves total.
One of the newer leaves.
Underside of the same older leaf.